A corridor train is a type of train that has a hallway or corridor running through its length. Another term for corridor train is an intercity train, which is used for long-distance travel between cities. A coach train is also another synonym for a corridor train, which offers comfortable seating and amenities such as food and restroom facilities. A long-distance train is another term for a corridor train, which typically has sleeping cars or compartments for overnight journeys. Express train, on the other hand, is a type of corridor train that provides high-speed transportation between major destinations. Overall, corridor trains have different variants and are popularly used for intercity, long-distance, and high-speed travel.